Uncategorized Quiz – Introduction to Organic Chemistry April 4, 2020April 4, 2020 Shveta 0 Comments IGCSE, O level Chemistry An alkene P has three Carbon atoms .Write the formula of P. C₃H₆C₃H₄C₃H₈C₃H₈O2. C5H11OH is an organic compound. What kind of compound is it? What is the name of the compound?Carboxylic acid, Pentanoic acidAlcohol, PentanolAldehyde, PentanalAlkane, Pentane3. An organic compound has the formula C₅H₈. What is the molecular formula of the organic compound immediately after it in the homologous series?C₆H₁₂C₆H₁₄C₆H₁₀C₇H₁₆4. Out of the given compounds, how many are alkanes , alkenes, alcohols, carboxylic acids respectively? C5H10, C5H12, C10H20, C10H22, C5H8, C10H18, C2H4, C3H8, C4H9OH, C5H11COOH, C5H11OH 3, 2, 1, 23, 3, 2, 12, 3, 1, 22, 2, 2, 15. Which of the following will not produce a pollutant when burnt in air?HydrogenPetrolKeroseneNatural gas6. Crude oil can be separated into different fractions by fractional distillation because the fractions have -Same melting pointsDifferent boiling pointsSimilar chemical propertiesDifferent densities7. All members of a homologous series -Have the same empirical formulaUndergo similar chemical reactionsHave the same physical state at room temperatureHave the same boiling point8. Which of the following is correct?Petrol has a fixed boiling point.Petrol is a mixture of hydrocarbons.Petrol oil is used for making polishes.Petrol is less volatile than Diesel.9. The diagram below shows how petroleum is separated into various fractions. Out of B, C and D, a) has the highest boiling point, evaporates most easily, produces the most smoke when burnt? D, B, DB, D, BD, B, BD, D, B10. Identify A and D respectively in the below diagram. Give one use of each. Petroleum gas - used as fuel for heating and cooking, Bitumen - used for making road surfacesPetroleum gas - used for running cars, Bitumen - used for making plasticNatural gas - used as fuel for heating and cooking, Naptha - used for making plasticPetroleum gas - used as fuel for heating and cooking, Petrol- used for running cars11. How do you know B and C are mixtures?Both B and C boil at fixed temperatures.Both B and C boil at same temperatures.Both B and C do not boil at fixed temperatures.Both B and C boil at similar temperatures. 12. The fractional distillation of petroleum produces a hydrocarbon Z which contains 81.8 % by mass of Carbon. The molecular mass of the Hydrocarbon is 58. After calculating the molecular formula of Z, choose in which petroleum fraction is Z found?PetrolDieselPetroleum gasKerosene13. Choose the wrong one -Petrol is less volatile than Diesel.Small hydrocarbons burn with a blue non smoky flame.Large hydrocarbons burn with a yellow smoky flame.Petrol is less volatile than Petroleum gas.14. Which statement about fractional distillation of Petroleum is not correct?The bitumen fraction is obtained below the kerosene fraction.Fraction obtained at the top of the fractionating column has the highest boiling point.Lubricating oil is source of polish and wax.Relative mass of bottom fractions is higher than the fractions at the top. 15. In a fractionating column, which compounds leave from the top of column ?Compounds that are least flammableCompounds that are most viscousCompounds with high molecular massCompounds with lowest boiling point16. Which statement about the fractional distillation of petroleum is correct?At each level in the column, only one compound is collected.The higher the column, the greater the temperature.The molecules collected at the bottom are the most flammable.The molecules reaching the top of the column have smallest relative molecular mass.17. Glycerine is used as an antifreeze in car radiators. The formula of glycerine is - The chemical properties of glycerine are expected to be similar to that of -PropanePropenePropanolPropanoic acid18. Pick the odd one out -BiogasBiodieselGasoholPetrol19. Arrange in order of decreasing volatility - diesel oil, kerosene, naptha, petroleum gas, bitumenPetroleum gas, kerosene, diesel oil, naptha, bitumenPetroleum gas, naptha, kerosene, diesel oil, bitumenPetroleum gas, naptha, diesel oil, kerosene, bitumenBitumen, Petroleum gas, naptha, kerosene, diesel oil, 20. Out of the fractions, diesel oil, kerosene, naptha, petroleum gas and bitumen, which a) contains Propane b) is used as a starting material for plastics c) contains hydrocarbons with more than 20 Carbon atoms per molecule respectively.Diesel oil, Naptha, BitumenPetroleum gas, Naptha, Bitumenkerosene, Naptha, Diesel oilPetroleum gas, Naptha, Bitumen21. Which compound from the following is not organic?PentaneDeionised waterStearic acidEthanol22. Which compounds belong to the same homologous series?CH3Cl and CH3COClCH3OH and CH3-O-CH3CH3COOH and HCOOHCH3COOH and CH3CH2OH23. The organic compounds X and Y belong to the same homologous series. Compound X has the chemical formula CH3NH2. Which other compound could be Y?CH3CONH2NH3CH3CH2NH2CH3CH2CN24. Ethanol can be obtained from -WheatSugarcaneRicePeas25. Choose the wrong one -Petroleum gas is used for cooking and heating.Naptha is used as a feedstock for the petrochemical industry.Petrol is used as a fuel in aircrafts.Bitumen is used for paving road surfaces.
